Timothy i



(No iModel.)

T.D.MERNAN.

PIPE WRENCH.

Patented Novi 22,1881.

Maf/@WAL UNITED STATES PATENT OFFICE.

TIMOTHY D." MERNAN, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO ALAN H. G. HARDWIOKE, OF SAME PLACE.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 249,988, dated November 22, 1881.

Application filed October 7, 1881.

To all whom 'it may concern Y Be it known that I, TIMOTHY D. MEENAN, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Pipe-Wrenches,

of which the following is a specification.

This invention relates to that class of pipewrenches which consists of a lever provided with a serrated or roughened end, which bites Io upon the pipe, and a chain which is attached to the lever and encircles the pipe and holds the lever in contact therewith.

\ Heretofore the chain was rigidly attached to the lever by lugs, staples, or otherwise, and

the loose end of the chain, after being passed around the pipe, was fastened tojaws or claws formed on the lever. The projectinglugs,jaws, and other fastening devices are liable to be broken by the rough usage to which these 2o wrenches are exposed, whereby the implement is rendered useless.

The object of my invention is to do away with these fastening devices; and it consists of a pipe-wrench the lever of which is provided with a perforation or opening through which a detachable chain is drawn, one end of which is provided with a hook or other fast' ening device, which is attached to that portion of the chain which has been wound around the pipe, thereby holding the lever against the pipe.

In the accoi'npanying drawings, Figure l is a side elevation of my improved wrench, and Fig.2 a top plan view thereof. Fig.3 is a vertical section of the biting end of the lever on an enlarged scale, and Fig. 4 a top-plan view thereof. y

Like letters of reference refer to like parts in the several iigures.

A represents the pipi, to which the wrench is applied.

B represents the lever of the wrench, provided with acurved face, b, which bears against the pipe. The serrated portion c of this face is made separate from the lever and secured in the latter by dovetailing, or in any other suitable manner, so as to be readily applied and removed. When this serrated face-piece (No model.)

is worn out it is driven out of its seat in the lever and a new piece is put in its place, and 3o by this simple operation the biting-face is rendered as eective as it was when new.

dis a cross-shaped perforation or opening extending through the lever near its biting end,and Eis the chain which is passed through the perforation d. This chain is provided at one end with a hook,f, and made of sufficient length to encircle the pipe to which the wrench is applied and to leave an excess of chain, to which the hook can be fastened. 6c

In applying my improved wrench to a pipe the chain E is drawn fromabove through the perforation d until the hook f comes almost in contact with the lever. The loose end of the chain is then drawn under and around the pipe and connected on the upper side of the pipe with lthe hooked end of the chain, so as to hold the lever firmly against the pipe. The wrench is then used in a well-knownmanner. The chain is readily disconnected from the le'- 7o ver, and the latter has no projecting parts which can be broken or bent, and the device is consequently very durable. The end of the lever is provided with a notch,g, in which the chain is guided and held against lateral dis- 4 placement when the wrench is applied to a small pipe.

The lever may be constructed of wrought ormalleable iron, as may be preferred.

I claim as my invention- 8o l. In a pipe-wrench, the combination, with the lever B, having a perforation, d, of a chain adapted to be drawn through said perforation and means whereby oneend of the chain can be fastened to the body thereof, substantially 8 5 as set forth.

2. In a chain pipe-wrench, the combination, with a lever B, provided with a perforatiomd, of a chain, E, adapted to be drawn through the perforation of the lever, and provided at 9o one end with a hook,f, substantially as and for the purpose set forth.

TIMOTHY D. MERNAN. Witnesses JN0. J. BONNER, A. H. G. HARDwIcKE. 

